Update the connectionToken arg to the new format

As of microsoft@a67d90a the `connectionToken` argument is being renamed to `connection-token`

Author: filiptronicek

README.md

@@ -30,12 +30,12 @@ docker run -it --init -p 3000:3000 -v "$(pwd):/home/workspace:cached" gitpod/ope
 
 #### A note about security tokens
 
-Since OpenVSCode Server v1.62, you must access the Web UI using a connection token generated by the server. If that's not what you're looking for, and instead want to generate these tokens by yourself, start the server with `--connectionToken YOUR_TOKEN` to force your secret to be used. If you want your development environment to be even more secure, create a plaintext file with the desired token as its contents and provide it to the server with `--connection-secret YOUR_SECRET_FILE`.
+Since OpenVSCode Server v1.62, you must access the Web UI using a connection token generated by the server. If that's not what you're looking for, and instead want to generate these tokens by yourself, start the server with `--connection-token YOUR_TOKEN` to force your secret to be used. If you want your development environment to be even more secure, create a plaintext file with the desired token as its contents and provide it to the server with `--connection-secret YOUR_SECRET_FILE`.
 
 For those using docker-compose you can set a connection token by using `command`. For example:
 
 ```yaml
-command: --connectionToken yourTokenHere
+command: --connection-token yourTokenHere
 ```
 
 _Note_: Feel free to use the `nightly` tag to test the latest version, i.e. `gitpod/openvscode-server:nightly`.